All changes to tower
| Date | Change | Source |
|---|---|---|
| 4 Nov 2016 | 1-5: canon info added | David Sloman via 00011828 |
| 2 Nov 2016 | 1-5: frameid added; frame info added | John Baldwin via database |
| 19 Jul 2015 | 1-4: nominal added; 5: nominal amended | Tim Jackson via 00011267 |
| 18 Oct 2006 | Tenor nominal added (G+24c) | Martin Smith (info: Alan Buswell) via e-mail |